package cn.tedu.ivos.application.service.impl;

import cn.tedu.ivos.application.mapper.ApplicationMapper;
import cn.tedu.ivos.application.pojo.dto.ApplicationQuery;
import cn.tedu.ivos.application.pojo.dto.ApplicationSaveParam;
import cn.tedu.ivos.application.pojo.entity.Application;
import cn.tedu.ivos.application.pojo.vo.ApplicationVO;
import cn.tedu.ivos.application.service.ApplicationService;
import cn.tedu.ivos.audit.mapper.AuditMapper;
import cn.tedu.ivos.audit.pojo.vo.AuditVO;
import cn.tedu.ivos.audit.service.AuditService;
import cn.tedu.ivos.base.enums.ApplicationStatusEnum;
import cn.tedu.ivos.user.mapper.UserMapper;
import cn.tedu.ivos.user.pojo.vo.UserVO;
import cn.tedu.ivos.vehicle.mapper.VehicleMapper;
import cn.tedu.ivos.vehicle.pojo.entity.Vehicle;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.context.annotation.Bean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.StringJoiner;

/**
 *
 */
@Slf4j
@Service
@Transactional//开启事务
public class ApplicationServiceImpl implements ApplicationService {
    @Autowired
    ApplicationMapper applicationMapper;
    @Autowired
    AuditService auditService;
    @Autowired
    UserMapper userMapper;
    @Autowired
    private AuditMapper auditMapper;
    @Autowired
    private VehicleMapper vehicleMapper;

    @Override
    public void save(ApplicationSaveParam applicationSaveParam) {
        log.debug("保存申请单:applicationSaveParam={}", applicationSaveParam);
        Application application = new Application();
        BeanUtils.copyProperties(applicationSaveParam, application);
        //新增申请单，初始状态为“已发起”
        application.setStatus(ApplicationStatusEnum.PENDING.getCode());
        application.setCreateTime(new Date());
        //将准备好的申请单数据存入申请表中
        /*遇到的问题:新增申请单对应的审批单数据时，审批数据没有申请id
         *原因: id是一个很特殊的属性，无法通过其它字段进行select查询
         *解决方案:给此insert ()对应的SQL上:加配置useGeneratedKeys= "true” keyProperty= "id"
         *效果: JDBC会为当前的application对象自动生成自增主键,并把生成的主键值自动
         *赋值给当前application对象的id属体
         */
        applicationMapper.insert(application);

        //新增审核数据
        auditService.insertAudit(application);
    }

    @Override
    public List<ApplicationVO> selectApplication(ApplicationQuery applicationQuery) {
        log.debug("查询申请单:applicationQuery={}", applicationQuery);
         List<ApplicationVO> list=applicationMapper.selectApplication(applicationQuery);
        //遍历上方的申请但集合，为每一个申请单VO对象补充审批人数据
        for(int i=0;i<list.size();i++){
            ApplicationVO applicationVO=list.get(i);
          //处理申请单VO，给当前的申请单VO对象补充审批人数据
            assignAuditUserList(applicationVO);
        }

        return list;
    }

    @Override
    public void cancelApplication(Long applicationId) {
        log.debug("取消申请单:applicationId={}", applicationId);
        Application application = new Application();
        application.setId(applicationId);
        application.setStatus(ApplicationStatusEnum.CANCEL.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);

        //取消申请单时，同时取消对应的审批单
        auditMapper.deleteByApplicationId(applicationId);
    }

    @Override
    public void distribute(Long applicationId, Long vehicleId) {
        log.debug("分配申请单:applicationId={},vehicleId={}", applicationId, vehicleId);
        Application application = new Application();
        application.setId(applicationId);
        application.setVehicleId(vehicleId);
        application.setStatus(ApplicationStatusEnum.ALLOCATION.getCode());
        application.setUpdateTime(new Date());
        applicationMapper.update(application);

        Vehicle vehicle = new Vehicle();
        vehicle.setId(vehicleId);
        vehicle.setStatus("2");//车辆状态改为“已分配”
        vehicle.setUpdateTime(new Date());
        vehicleMapper.updateVehicle(vehicle);//数据层更新
    }

    @Override
public void back(Long applicationId, Long vehicleId) {
    log.debug("还车业务:applicationId={},vehicleId={}",applicationId,vehicleId);
    Application application = new Application();
    application.setId(applicationId);
    /* 方案1:车辆状态改为"空闲",申请单状态改为"工单结束",但申请单的车辆id仍旧保留 */
    //application.setVehicleId(vehicleId);//设置要归还哪辆车
    /* 方案2:车辆状态改为"空闲",申请单状态改为"工单结束",但申请单的车辆id要设置为null */
    application.setVehicleId(null);//设置要归还哪辆车
    //设置当前申请单的状态为"工单结束"
    application.setStatus(ApplicationStatusEnum.END.getCode());
    application.setUpdateTime(new Date());
    /* 方案1:可以使用之前的更新SQL*/
//    applicationMapper.update(application);
    /* 方案2:需要重写一个将车辆id置为null值的新SQL*/
    applicationMapper.back(application);

    //还车需要把车辆状态修改为"空闲"
    Vehicle vehicle = new Vehicle();
    vehicle.setId(vehicleId);
    vehicle.setStatus("1");
    vehicleMapper.updateVehicle(vehicle);
}

    private void assignAuditUserList(ApplicationVO applicationVO) {
        //1.准备空集合,分别用来保存此申请单对应的审批人姓名与id集合
        List<String> auditUsernameList = new ArrayList<>();
        List<Long> auditUserIdList = new ArrayList<>();
        //2.根据传入的申请单对象,查出对应的审批单
        List<AuditVO> auditVOList = auditService.selectAuditByApplicationId(applicationVO.getId());
        //3.遍历依据申请单id查出来的审批单集合
        for (int i = 0;i<auditVOList.size();i++){
            AuditVO auditVO = auditVOList.get(i);
            //4.取出当前审批单中的审批人id,并存入上方的空集合中
            Long id = auditVO.getAuditUserId();
            auditUserIdList.add(id);
            //5.根据刚刚取出来的审批人id,查出此人的姓名,并存入上方的姓名空集合中
            UserVO userVO = userMapper.selectById(id);
            auditUsernameList.add(userVO.getUsername());
        }
        //6.准备一个拼接工具,帮我们将所有审批人姓名连接成一个字符串
        StringJoiner stringJoiner = new StringJoiner(",");
        for(String username : auditUsernameList){
            stringJoiner.add(username);
        }
        //将拼接好的审批人姓名字符串赋值给申请单VO的AuditUsernameList属性
        applicationVO.setAuditUsernameList(stringJoiner.toString());
        //将准备好的审批人id集合赋值给申请单VO的AuditUserIdList属性
        applicationVO.setAuditUserIdList(auditUserIdList);
    }
}
